Which channel is reserved for Digital Selective Calling?

Digital Selective Calling (DSC) is a vital feature of the Global Maritime Distress and Safety System (GMDSS) that allows vessels to send automated distress and safety messages. Channel 70 is specifically reserved for DSC communications. This channel is unique in that it solely handles digital messages, ensuring that distress calls can be sent and received without interference from voice communications.

The importance of Channel 70 lies in its ability to facilitate emergency communication efficiently, allowing vessels to send alerts and receive acknowledgments from nearby vessels or coast stations swiftly. This helps to enhance overall maritime safety by ensuring that distress signals are transmitted and received with high priority.

In contrast, the other channels listed serve different purposes: Channel 16 is primarily for safety and distress voice communications, while Channel 9 is used for non-emergency communication between recreational boaters. Channel 22A is utilized for non-commercial communication in the marine band but is not designated for DSC use. Understanding the specific purpose of each channel is crucial for effective communication and safety at sea.